True
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False. Erosion control should begin before the first evidence of erosion. When building bridges over waterways, construction contractors are already devising ways to control erosion so the bridge does not fall into the water later on.
False. One foot must be in contact with the surface at every time.
When interpreting what you have observed, you are making an inference based on the available evidence. This inference can be either true or false depending on the accuracy of the observations and the validity of the reasoning used to make the interpretation.
If you are just holding the cat and nothing is being moved toward or away from the ground, no work is being done.
false